Traffic-Watch+provides continuous traffic awareness. The ATD-300 detects all transponder type replies from nearby traffic and display their range, direction (with opt.ANT-300 antenna) and altitude on a bright digital LED display or on an external display such as the G530/G430. Simultaneously, a clear female voice prompts you with VOICE ALERTS in relation to traffic proximity. Traffic detection is direct plane to plane with no need for an ADS-B/UAT ground station. Traffic-Watch+ also checks your transponder operation and bus voltage. All of these in a compact unit the size of cigarette pack.